goblin: one-toggle add-identity sheet, kill the dead Generate button (Build 148)

The add sheet's "Generate new" was a mode toggle that set import=false — the
mode the sheet already opens in — so it read as a completely dead button, and
the four-button layout (Generate new / Import / Cancel / Add) mixed two silent
mode toggles with two actions.

The sheet now DEFAULTS to generate mode with a one-line note saying a fresh
anonymous key will be created; the standalone "Generate new" button is gone.
One clear toggle sits above the action row and always names the OTHER mode:
"Import an existing identity instead" switches to import mode (revealing the
.backup picker and nsec paste inputs), where it becomes "Create a new key
instead" to switch back. The action row stays exactly Cancel + Add — Add
creates a fresh identity in generate mode and imports in import mode — keeping
the 147 modal-lock, uniform-button and CenterTop conventions. The old
generate/import toggle labels are removed from all six locales and the new
generate_note / import_instead / generate_instead strings added; drift green.

locales/de.yml

@@ -685,9 +685,10 @@ goblin:
     held: "Vorhandene Identitäten"
     add: "Identität hinzufügen"
     add_title: "Eine Identität hinzufügen"
-    generate: "Neu erzeugen"
-    import: "Importieren"
     nsec_hint: "Nsec einfügen"
+    generate_note: "Ein neuer, anonymer Schlüssel wird für diese Wallet erstellt."
+    import_instead: "Stattdessen eine bestehende Identität importieren"
+    generate_instead: "Stattdessen einen neuen Schlüssel erstellen"
     choose_backup: "Eine .backup-Datei wählen"
     backup_selected: "Backup-Datei ausgewählt"
     delete_short: "Identität löschen"

locales/en.yml

@@ -685,9 +685,10 @@ goblin:
     held: "Held identities"
     add: "Add identity"
     add_title: "Add an identity"
-    generate: "Generate new"
-    import: "Import"
     nsec_hint: "Paste an nsec"
+    generate_note: "A fresh, anonymous key will be created for this wallet."
+    import_instead: "Import an existing identity instead"
+    generate_instead: "Create a new key instead"
     choose_backup: "Choose a .backup file"
     backup_selected: "Backup file selected"
     delete_short: "Delete identity"

locales/fr.yml

@@ -685,9 +685,10 @@ goblin:
     held: "Identités détenues"
     add: "Ajouter une identité"
     add_title: "Ajouter une identité"
-    generate: "En générer une"
-    import: "Importer"
     nsec_hint: "Coller un nsec"
+    generate_note: "Une nouvelle clé anonyme sera créée pour ce portefeuille."
+    import_instead: "Importer plutôt une identité existante"
+    generate_instead: "Créer plutôt une nouvelle clé"
     choose_backup: "Choisir un fichier .backup"
     backup_selected: "Fichier de sauvegarde sélectionné"
     delete_short: "Supprimer l'identité"

locales/ru.yml

@@ -685,9 +685,10 @@ goblin:
     held: "Имеющиеся личности"
     add: "Добавить личность"
     add_title: "Добавить личность"
-    generate: "Создать новую"
-    import: "Импорт"
     nsec_hint: "Вставьте nsec"
+    generate_note: "Для этого кошелька будет создан новый анонимный ключ."
+    import_instead: "Вместо этого импортировать существующую личность"
+    generate_instead: "Вместо этого создать новый ключ"
     choose_backup: "Выбрать файл .backup"
     backup_selected: "Файл резервной копии выбран"
     delete_short: "Удалить личность"

locales/tr.yml

@@ -685,9 +685,10 @@ goblin:
     held: "Mevcut kimlikler"
     add: "Kimlik ekle"
     add_title: "Bir kimlik ekle"
-    generate: "Yeni oluştur"
-    import: "İçe aktar"
     nsec_hint: "Bir nsec yapıştır"
+    generate_note: "Bu cüzdan için yeni, anonim bir anahtar oluşturulacak."
+    import_instead: "Bunun yerine mevcut bir kimliği içe aktar"
+    generate_instead: "Bunun yerine yeni bir anahtar oluştur"
     choose_backup: "Bir .backup dosyası seç"
     backup_selected: "Yedek dosyası seçildi"
     delete_short: "Kimliği sil"

locales/zh-CN.yml

@@ -685,9 +685,10 @@ goblin:
     held: "已持有的身份"
     add: "添加身份"
     add_title: "添加一个身份"
-    generate: "新建"
-    import: "导入"
     nsec_hint: "粘贴 nsec"
+    generate_note: "将为此钱包创建一个全新的匿名密钥。"
+    import_instead: "改为导入现有身份"
+    generate_instead: "改为创建新密钥"
     choose_backup: "选择 .backup 文件"
     backup_selected: "已选择备份文件"
     delete_short: "删除身份"

src/gui/views/goblin/mod.rs

@@ -5089,57 +5089,15 @@ impl GoblinWalletView {
 								.color(t.surface_text),
 						);
 						ui.add_space(8.0);
-						// Generate vs import toggle: two equal-width in-panel buttons,
-						// matching the Cancel/Add row below. `big_action_on_card_ink`
-						// sizes to `ui.available_width()`, so each must be constrained
-						// to half the panel — otherwise the first button eats the whole
-						// width and the second (Import) overflows the card.
-						ui.horizontal(|ui| {
-							let half = (ui.available_width() - 10.0) / 2.0;
-							ui.scope_builder(
-								egui::UiBuilder::new().max_rect(egui::Rect::from_min_size(
-									ui.cursor().min,
-									Vec2::new(half, 44.0),
-								)),
-								|ui| {
-									if w::big_action_on_card_ink(
-										ui,
-										&t!("goblin.identities.generate"),
-										if self.identity_switch.import {
-											t.surface_text
-										} else {
-											t.pos
-										},
-									)
-									.clicked()
-									{
-										self.identity_switch.import = false;
-									}
-								},
+						// The sheet defaults to GENERATE (a fresh anonymous key). What
+						// generating means, in one line, so the default mode isn't blank.
+						if !self.identity_switch.import {
+							ui.label(
+								RichText::new(t!("goblin.identities.generate_note"))
+									.font(FontId::new(12.5, fonts::regular()))
+									.color(t.surface_text_dim),
 							);
-							ui.add_space(10.0);
-							ui.scope_builder(
-								egui::UiBuilder::new().max_rect(egui::Rect::from_min_size(
-									ui.cursor().min,
-									Vec2::new(half, 44.0),
-								)),
-								|ui| {
-									if w::big_action_on_card_ink(
-										ui,
-										&t!("goblin.identities.import"),
-										if self.identity_switch.import {
-											t.pos
-										} else {
-											t.surface_text
-										},
-									)
-									.clicked()
-									{
-										self.identity_switch.import = true;
-									}
-								},
-							);
-						});
+						}
 						if self.identity_switch.import {
 							ui.add_space(8.0);
 							// (a) Select a .backup file. Desktop returns the path now;
@@ -5202,6 +5160,20 @@ impl GoblinWalletView {
 							});
 						}
 						ui.add_space(10.0);
+						// ONE mode toggle instead of the old Generate/Import pair (whose
+						// "Generate new" half was the already-active default and read as
+						// a dead button). Tapping switches the sheet's mode, revealing or
+						// hiding the import inputs; the label always names the OTHER mode.
+						let toggle_label = if self.identity_switch.import {
+							t!("goblin.identities.generate_instead")
+						} else {
+							t!("goblin.identities.import_instead")
+						};
+						if w::big_action_on_card(ui, &toggle_label).clicked() {
+							self.identity_switch.import = !self.identity_switch.import;
+							self.identity_switch.error.clear();
+						}
+						ui.add_space(10.0);
 						let import = self.identity_switch.import;
 						// Generate is always ready; import needs either a selected
 						// .backup or a pasted nsec. The password is entered in the modal.